Found below interesting articles, do check out-
Can we create child records in Pre-Operation Plugin?https://community.dynamics.com/forums/thread/details/?threadid=1e757e7a-60b2-4fc6-9a94-acea44b18f8c
What happens when we use ExecuteMultiple within Plugin?https://www.inogic.com/blog/2015/11/executemultiple-workflow-or-plugin-assemblies/
Recently in one of our custom pages, we had to set the default value (DefaultSelectedItems) of the combo box based on one of the lookup fields on the record. We were opening the custom page from the ribbon button on the form.
Below is our function to pass the record’s GUID to the custom page from the button.
openSearchCustomPage: function (primaryControl, firstPrimaryItemId) {
var pageInputCustom = {
pageType: 'custom',
name: 'custom_searchproduct_570ed',
entityName: 'lead',
recordId: firstPrimaryItemId
};
var navigationOptions = {
target: 2,
position: 1,
width: 1350
};
Xrm.Navigation.navigateTo(pageInputCustom, navigationOptions).then(
function success(result) {
console.log(result);
},
function error(error) {
console.log(error);
}
);
}
Next in App’s OnStart, we are setting the GUID of the record to a variable first, and than setting another variable to store the GUID of the Region lookup field on that record.
// text variable passed by the form / webresource/ ribbon
Set(varEnquiryIdWithoutCurlyBraces,GUID(Substitute(Substitute(Param("recordId"),"{",""),"}","")));
// get the Region Of Interest from the Lead / Enquiry ID
// If value present use it for prefiltering the Gallery Items
Set(varRegionOfInterest,LookUp(Enquiries,Lead=varEnquiryIdWithoutCurlyBraces, 'Region of Interest'));
And lastly, for the combo box (Items = Region (custom table)), we are setting the DefaultSelectedItems as follows
LookUp(Regions,Region=varRegionOfInterest.Region)
We also tried using the Filter option, but it was giving incorrect values.
The value on the form –
The value in the Custom Page –
Correct value populated for combo box Region, and incorrect for the one using Filter formula
Hope it helps..
Recently we faced an issue where one of the views was not showing its Name in the app.
On selecting the View Selector, we were not getting the option to select that view.
Checking in a Vanilla CRM instance, we can see it is OOB My Activities view.
To fix it, we had to edit the App, Add Page >> Dataverse Table >> Select exiting table >> Activity
And add that view to that app and publish the changes.
The result –
Hope it helps..
While trying to import the solution (patch), we were getting the below error.
“Expected non-empty Guid”
There was hardly any detail in the log file also 
We tried removing the solution component one by one in our source environment and trying the import again in the target environment.
Eventually removing the Pages (custom page) allowed us to import the solution successfully into the target environment.
We then compared the customization.xml of the current solution with the backup solution of the Target and see the information missing in the current solution.
Left is – Current solution (giving error) and Right is the backup solution of the target.
Interestingly next time when we extracted the new patch after a couple of days, we could see the tag there and so no issues that time.
Hope it helps.
Recently while trying to import the solution, we got the below error – 
The tab tag was missing the labelid property. Adding it back to the FormXml using FormXml
Manager XrmToolBox plugin fixed it.
Also check – https://nishantrana.me/2022/11/11/adding-contact-insights-account-insights-to-the-form-dynamics-365-marketing/
Hope it helps..
Recently while importing the solution in our UAT we got the below error –
It was showing the above entity relationships missing in the solution. We could not find them inside the Power Apps Maker Portal, to add them in the source solution.
Interestingly enough we were able to find them from the classic solution explorer.
Adding them to the source solution and trying the import fixed the issue for us.
Hope it helps..
Nishant Rana's Weblog 